公开(公告)号：US20060274632A1

公开(公告)日：2006-12-07

申请号：US11443510

申请日：2006-05-31

申请人： Jyouji Yoshioka

发明人： Jyouji Yoshioka

IPC分类号： G11B7/00

CPC分类号： G11B7/1263

摘要： To make the output voltage of a laser power monitor circuit (12) equal to a predetermined value at a predetermined laser power, adjustment is performed by changing an external variable resistance for output voltage adjustment. To achieve this, adjustment is performed by changing the variable resistance so that the difference between a high level output pulse of the laser power monitor circuit (12) obtained when an LD (11) is turned off and a low level output pulse obtained when the LD (11) is turned on is made equal to a target adjusted voltage. This prevents the offset of the laser power monitor circuit (12) from affecting a monitor output voltage, allowing an optical pickup to perform, for example, recording and reproducing with higher accuracy.

摘要翻译： 为了使激光功率监视电路（12）的输出电压在预定的激光功率下等于预定值，通过改变用于输出电压调节的外部可变电阻来进行调节。 为了实现这一点，通过改变可变电阻来执行调节，使得当LD（11）关断时获得的激光功率监视电路（12）的高电平输出脉冲与当（11）关闭时获得的低电平输出脉冲之间的差值 使LD（11）导通等于目标调整电压。 这防止激光功率监视电路（12）的偏移影响监视器输出电压，允许光学拾取器以更高的精度进行例如记录和再现。

公开(公告)号：US07643396B2

公开(公告)日：2010-01-05

申请号：US11443510

申请日：2006-05-31

申请人： Jyouji Yoshioka

发明人： Jyouji Yoshioka

IPC分类号： G11B7/00

CPC分类号： G11B7/1263

摘要： To make the output voltage of a laser power monitor circuit (12) equal to a predetermined value at a predetermined laser power, adjustment is performed by changing an external variable resistance for output voltage adjustment. To achieve this, adjustment is performed by changing the variable resistance so that the difference between a high level output pulse of the laser power monitor circuit (12) obtained when an LD (11) is turned off and a low level output pulse obtained when the LD (11) is turned on is made equal to a target adjusted voltage. This prevents the offset of the laser power monitor circuit (12) from affecting a monitor output voltage, allowing an optical pickup to perform, for example, recording and reproducing with higher accuracy.

摘要翻译： 为了使激光功率监视电路（12）的输出电压在预定的激光功率下等于预定值，通过改变用于输出电压调节的外部可变电阻来进行调节。 为了实现这一点，通过改变可变电阻来执行调节，使得当LD（11）关断时获得的激光功率监视电路（12）的高电平输出脉冲与当（11）关断时获得的低电平输出脉冲之间的差 使LD（11）导通等于目标调整电压。 这防止激光功率监视电路（12）的偏移影响监视器输出电压，允许光学拾取器以更高的精度进行例如记录和再现。

公开(公告)号：US20060171289A1

公开(公告)日：2006-08-03

申请号：US11344209

申请日：2006-02-01

申请人： Teruaki Sogawa ,  Jyouji Yoshioka ,  Yoshiaki Ukawa ,  Takashi Kasahara ,  Katsuichi Inoue

发明人： Teruaki Sogawa ,  Jyouji Yoshioka ,  Yoshiaki Ukawa ,  Takashi Kasahara ,  Katsuichi Inoue

IPC分类号： G11B7/24 ,  G11B5/09

CPC分类号： G11B20/1816 ,  G11B7/00458 ,  G11B7/24082 ,  G11B7/24085

摘要： With conventional test discs, changing them takes much time when a pickup is subjected to signal evaluation with respect to DVD- family discs (DVD-R and DVD-RW) and DVD+ family discs (DVD+R and DVD+RW), leading to low testing efficiency. A test disc of the invention has, formed on a single glass substrate, areas where there are provided regions where pits or no pits are formed and areas where there are provided regions where wobbles and land prepits are formed with varying parameters.

摘要翻译： 对于传统的测试光盘，当拾取器相对于DVD系列光盘（DVD-R和DVD-RW）和DVD +家庭光盘（DVD + R和DVD + RW）进行信号评估时，更换它们需要很多时间，导致 测试效率低。 本发明的测试盘在单个玻璃基板上形成有形成凹坑或不形成坑的区域的区域，其中形成有具有变化参数的摆动和焊盘预凹坑的区域。